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RRS Challenger CH77
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | CH77 |
| Cruise period | 1991-04-05 — 1991-04-20 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | Biogeochemical cruise to study amd model the flux of material and water. Part of the Anglo-French programme FLUXMANCHE |
| Chief scientist | Simon Boxall (University of Southampton Department of Oceanography) |
| Project | FLUXMANCHE |
| Coordinating body | FLUXMANCHE Chief coordinator, Dr. L. Cabioch, Station Biologique, Roscoff |
| Ocean/sea areas | |
| General | English Channel |
| Specific | Eastern English Channel, Dover Straits |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 2000 |
| Water bottle stations | Quantity: number of profiles = 81 Description: General Oceanics Multisampler, top & near bottom samples |
| CTD stations | Quantity: number of deployments = 150 Description: NBIS |
| Transparency (eg transmissometer) | Quantity: track kilometres = 2000 |
| Transparency (eg transmissometer) | Quantity: number of deployments = 150 Description: NBIS |
| Optics (eg underwater light levels) | Quantity: number of deployments = 150 Description: NBIS |
| Optics (eg underwater light levels) | Quantity: number of measurements = 18 Description: spectra from sea surface using spectron radiometer |
| Current meters | Quantity: number of stations = 5 Description: 10 deployed, 4 recovered |
| Current profiler (eg ADCP) | Quantity: track kilometres = 2000 Description: RDI ADCP |
| Other physical oceanographic measurements | Quantity: number of flights = 2 Description: SLAR - plane over Dover Straits and Cap la Hague |
| Other physical oceanographic measurements | Quantity: number of flights = 2 Description: line spectro: 2 states tide - plane over Dover Straits |
| Chemical oceanography | |
| Oxygen | Quantity: number of deployments = 150 Description: NBIS |
| Phosphate | Quantity: number of profiles = 67 |
| Nitrate | Quantity: number of profiles = 67 |
| Nitrite | Quantity: number of profiles = 67 |
| Ammonia | Quantity: number of profiles = 67 |
| Silicate | Quantity: number of profiles = 67 |
| Isotopes | Quantity: number of profiles = 8 Description: carbon isotope |
| Contamination | |
| Suspended matter | Quantity: number of profiles = 1 Description: 2 'SeaStar' pump, surface & at 5m |
| Suspended matter | Quantity: number of profiles = 81 Description: General Oceanics Multisampler (10 litre teflon lined) |
| Trace metals | Quantity: number of profiles = 67 Description: Al,Cd,Co,Cu,Mn,Fe,Ni,Pb,Zn,top & bottom samples |
| Trace metals | Quantity: number of profiles = 1 Description: 2 'SeaStar' pump, surface & at 5m |
| Trace metals | Quantity: number of samples = 11 Description: grab samples |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of profiles = 81 Description: General Oceanics Multisampler (10 litre teflon lined) |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of deployments = 150 Description: NBIS |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: track kilometres = 2000 |
| Particulate organic matter (inc POC, PON) | Quantity: number of profiles = 6 Description: trace organics |
| Dissolved organic matter (inc DOC) | Quantity: number of profiles = 6 Description: trace organics |
| Meteorology | |
| Incident radiation | Quantity: track kilometres = 2000 Description: subsurface underway measurements of incident radiation |
| Occasional standard measurements | Quantity: number of observations = 150 Description: Met. Observations at each CTD station |
| Routine standard measurements | Quantity: track kilometres = 2000 Description: every 3 hours |
| Geology and geophysics | |
| Grab | Quantity: number of samples = 11 Description: for particle size and chemical analysis |
| Single-beam echosounding | Quantity: track kilometres = 2000 Description: Underway PES bathymetry |
| Moorings, landers, buoys | |
| Physical oceanography | |
| Current meters | 50° 30' 0" N 1° 55' 59" W — (CM1) 2 Aanderaa, T,S,P sensors |
| Current meters | 49° 45' 0" N 1° 55' 59" W — (CM3), T,S,P sensors |
| Current meters | 50° 4' 59" N 1° 55' 59" W — (CM2) 2 Aanderaa, T,S,P sensors |
| Current meters | 50° 49' 59" N 1° 33' 0" E — laid/rec (6 days), CM5, T,S,P sensors |
| Current meters | 50° 46' 0" N 1° 28' 59" W — laid/rec (6 days), CM4, T,S,P sensors |
